D-And F-Block Elements Ques 418
Question: Ce-58 is a member of
[Pb. CET 2002]
Options:
A) s-block
B) p-block
C) d-block
D) f-block
Show Answer
Answer:
Correct Answer: D
Solution:
$ Ce-58 $ have configuration $ 1s^{2},2s^{2}2p^{6},3s^{2}3p^{6}3d^{10}, $ $ 4s^{2}4p^{6}4d^{10}4f^{2},5s^{2}5p^{6}5d^{0},6s^{2} $ Since, its last electron enter in f- sub-shell, therefore it is a member of f-block.
